The writing process for the majority of Metallicaâs albums have followed the same process. A large slew of guitar riffs written primarily by James Hetfield, sometimes Kirk Hammett, and rarely the bandâs bass player, (that now being bass virtuoso Robert Trujillo) are reviewed and selected.
1 Delhi is most polluted city in the world in PM2.5 concentrations. 2  Half of the top 20 most polluted cities were in India, according to data.  PM2.5 is considered most harmful to health.
Not far behind Bengaluru, Mumbai is the second least polluted city in India. Pretty strange considering the population and the number of cars. We just attribute the non-pollution to the loved-hated Mumbai local (and recently the Mono/Metro, although no one really understands the difference between the two).